--- zzzz-none-000/linux-3.10.107/arch/mips/include/asm/dma-coherence.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/include/asm/dma-coherence.h	2021-02-04 17:41:59.000000000 +0000
@@ -9,7 +9,16 @@
 #ifndef __ASM_DMA_COHERENCE_H
 #define __ASM_DMA_COHERENCE_H
 
+#ifdef CONFIG_DMA_MAYBE_COHERENT
 extern int coherentio;
 extern int hw_coherentio;
+#else
+#ifdef CONFIG_DMA_COHERENT
+#define coherentio	1
+#else
+#define coherentio	0
+#endif
+#define hw_coherentio	0
+#endif /* CONFIG_DMA_MAYBE_COHERENT */
 
 #endif